How long have you had the snakes? I have a pair of them and they took a few weeks to adjust. I use a portable shift box. I harassed them with a hook until they went into the box to avoid me. After a couple months a couple light taps with the hook was enough for them to go in the box on their own. Beleive it or not, now all I do is open the cage and my male will put his front 2ft into the box and sit there while I service the cage with the rest of his body and tail out of the box! I have had my male for 3 years. They are smart and learn the routines. This can work for you or against you. Mine are feeding on unscented frozen rats and are Thailand locale. They are in front opening cages (6ft Neodeshas). Be consistant with your husbandry practises and they will make it easier given time.
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Tim Cole
www.Designeratrox.com/
www.AustinReptileService.net
www.AustinReptileExpo.com/
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Conservation through Education